<template>
	<div class="imguploads">
		<el-upload class="avatar-uploader" action="https://jsonplaceholder.typicode.com/posts/"
                  :show-file-list="false" :on-success="handleAvatarSuccess" :before-upload="beforeAvatarUpload">
  <img v-if="imageUrl" :src="imageUrl" class="avatar">
  <i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>
	</div>
</template>

<script>
	export default {
		data() {
			  return {
				imageUrl: ''
			  };
			},
			methods: {
			  handleAvatarSuccess(res, file) {
				this.imageUrl = URL.createObjectURL(file.raw);
			  },
			  beforeAvatarUpload(file) {
				const isJPG = file.type === 'image/jpeg';
				const isLt2M = file.size / 1024 / 1024 < 2;

				if (!isJPG) {
				  this.$message.error('上传头像图片只能是 JPG 格式!');
				}
				if (!isLt2M) {
				  this.$message.error('上传头像图片大小不能超过 2MB!');
				}
				return isJPG && isLt2M;
			  }
			}
	}
</script>

<style>
.avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }
  .avatar-uploader .el-upload:hover {
    border-color: #409EFF;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 178px;
    height: 178px;
    line-height: 178px;
    text-align: center;
  }
  .avatar {
    width: 178px;
    height: 178px;
    display: block;
  }
</style>
